Answer:
the federal government
Explanation:
The Tenth Amendment to the United States Constitution restricts the federal government's powers to those specified in the Constitution and its amendments, leaving all other powers to the states and "the general population." This is significant in light of the fact that the federal government has only recently defined forces, which are limited to those "recorded" in the Constitution, otherwise known as identified forces. Without that constraining modifier, the federal government, specifically Congress, has been held to have unenumerated powers under what is known as the "necessary and proper" provision (Article I, Section 8), which allows Congress to make any laws that are necessary and proper to carry out the listed obligations, those that are specifically named. The manner in which the crucial and valid provision was integrated has been deciphered to imply that it encompasses many powers.
The Pleistocene often colloquially referred to as the Ice Age) is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the world's most recent period of repeated glaciations. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology.
Due to decreased light penetration, B. THE MOUTH of the rivers and streams will have less diversity of plant life.
The decreased light penetration is brought about by the murkiness of the water due to numerous deposits of sediments. Sediments that have been collected at the water travels towards the mouth of the rivers and streams causes the water to be muddy and murky making it impossible for light to penetrate.